Ok, I have been playing Civ V for a while, but have not loaded up any DLC's other than Mongolia. I would like to download all the official DLC's and purchase all the official Civ V stuff, but have three problems. First, I'm not sure how (or where) to purchase the stuff that I am looking for. Second, which DLC's are safe to download and where do I find them? And third, how can I make sure Steam will recognize them and add them to my games? Regarding the third point, I seem to recall purchasing something minor a while ago, but it never showed up in my Steam account.